(1) Wrong Yarn
Appearance: In the wool of knitted fabrics, horizontally continuous loops are woven from thicker or thinner yarns. Generally, it is a single root, but occasionally there are many parallel or spaced roots. The difference between the density and thickness is normal.
Causes:
When weaving knitted fabrics, the operator mistakenly used non-specified count or Danny yarn. If the finer yarn is misused, the fabric appears thin. If the thicker yarn is misused, the fabric will appear dense.
(2) Wrong End
Appearance: The warp of the woven fabric has a single or several parallel thicknesses that are not specified. If it is a thinner yarn, it is called Fine End. If it is a thicker yarn, it is called Coarse End.
Causes:
The warp yarn with the unspecified specification is used for the wrong count of the drawn bobbin yarn during warping. Such defects are often wholly guilty.
(3) Wrong Pick
Appearance: The weft of the woven fabric has one or more continuous non-specified thickness. If it is a finer yarn, it is called Fine Pick. If it is a thicker yarn, it is called coarse pick.
Causes:
During weaving, the weft yarn in the weft bobbin or the bobbin yarn count fed by the shuttleless loom is wrong. Use a weft yarn of a non-specified specification. After discovering, the operator will stop the machine and remove it. However, the loom with automatic tube change is often not easy to find.
(4) Wrong Weaving
Appearance: The weave is wrong, and the texture of the fabric is different from the original designer. For example, the left twill is woven into the right twill.
Causes:
Generally, it is caused by tying errors. Others such as wrong pattern of jacquard fabric, wrong warp arrangement of multi-spec warp fabric, etc.
(5) and by (Wrong Draw)
Appearance: Two adjacent warp yarns are merged together, according to the fabric structure as a woven into the cloth. In view of this, the yarn (in fact two) is particularly thick. Such defects are all scammers? If it is found during the initial weaving of the warp beam, one of the roots in the juxtaposition can be avoided completely?
Causes:
1. When warping and drawing yarn, it is negligent to treat two as one.
2. After the sizing, the yarn is not clear, and the two stick together to form the same one.
3. When threading a heald, two threads penetrate the same heald.
(6) Parallel weft (Mispick)
Appearance: Two weft yarns are woven into the same weave, and even three or more. The length of the parallel weft varies, and the width of the full width of the fabric is more than the width of 10 cm near the two sides.
Causes:
1. The full length of the fabric is parallel and weft. After the machine is shut down to eliminate the fault, the weaving opening is not checked. Or the weft-finding needle fails, and the weft-breaking does not stop automatically.
2. The parallel weft of the full length is not long enough, the warp is not long enough, the side shear is set improperly or not sharp enough, and the yarn tail is not cleared after weft break.
(7) Rare? (Set Mark, Fine)
Appearance: The density of weft yarns arranged on the fabric is less than specified. The weft yarn woven along the length of the fabric gradually becomes thinner from the normal density, and then gradually restores to the original density from the thinnest, forming a sparse cloth surface of equal width and narrow width.
Causes:
1. The weft-finding needle is out of order. When there is no weft yarn, the yarn will continue to be idling.
2. Improper warp tension control during weaving.
3. Warp tension adjustment is too tight before stopping and driving.
(8) Set Mark (Coarse)
Appearance: The density of weft yarns arranged on the fabric is denser than specified. The weft yarn woven along the length of the fabric gradually becomes denser from the normal density, and then gradually restores to the original density from the most dense, forming a compact cloth with equal width and narrow width.
Causes:
1. Improper control of warp tension during weaving.
2. Warp tension adjustment is too loose when shutting down and then driving.
(9) Pick-Out Mark
Appearance: The weft yarn of the raw fabric is not well removed, and after weaving, the trace of the fabric surface is still left.
Causes:
During the weaving of fabrics, the operator found that there were different wefts weaving, or weaving a serious dense road or thin weaving, and immediately shut down to cut and remove the weft yarn weaved. During the dismantling, the warp yarns were rubbed off by the weft yarns and produced a large amount of hairiness. Therefore, after re-weaving, in the original dismantling area, a hairy feather cloth with an equal width was displayed.
(10) Broken End
Appearance: One or more warp yarns of the fabric are broken, so that the distance between the two adjacent yarns on the left and right becomes larger. In plain weave fabrics, it becomes two yarn breaks juxtaposed, like warp. In the case of twill fabrics, there is a discontinuity in the cloth patterns.
Causes:
The warp yarn was interrupted during weaving, the stop device failed, and the weaving was continued without connecting the warp yarn.
(11) Broken Pick
Appearance: The weft yarn in the fabric is broken, but the distance between the two ends is very close, that is, the length of the broken is small. Such defects are generally not significant.
Causes:
1. The weft yarn breaks during weaving, but it continues to weave in an instant, only a short distance is missing.
2. There are serious coarse knots and flying flowers on the weft yarn, which will cause the weft yarn to break when removed.
(12) Hundred feet (lack of weft)
Appearance: This kind of defect only occurs in twill weaving, and the warp yarns in the same part of each complete organization float on the cloth surface at the same time, like a set of centipede?
Causes:
If weft yarn is woven into a weft yarn less, the interweaving point is reduced, and some warp yarns float on the weft yarn twice in a row.
(13) End Snarl
Appearance: One of the warp yarns of the fabric, a small section of curled and twisted together woven into the fabric. Fabrics woven on strong twisted yarn are more likely to occur.
Causes:
During warping, one of the warp yarns was excessively relaxed, causing a period of curling.
(14) Filling Snarl
Appearance: A small section of fabric weft yarn is crimped, twisted and woven into the fabric. Fabrics woven on strong twisted yarn are more likely to occur.
Causes:
1. In the weft bobbin or the package yarn used for weft yarn, there is a phenomenon that a small length of yarn is wound and twisted.
2. Improperly formed weft bobbin and unsmooth yarn withdrawal.
3. The tension of the weft yarn is too small, and the opening of the weave is unclear.
(15) Reed Mark
Appearance: There is a large gap between the two warp yarns of the fabric, and the weft yarn woven in can be seen, and the zigzag traces are produced by the effect of the steel reed teeth.
Causes:
1. The steel reed teeth are deformed, failing to control the warp yarn in position, or the reed teeth are loose.
2. There is one or several warp threads in the warp, and the tension received during weaving is too large.
(16) Temple Mark
Appearance: There are about 2 to 5 cm wide needle sticks or scratches on the fabric edge. In severe cases, the weft yarns in this part are wavyly bent.
Causes:
The thickness of the needle used for the side brace is not suitable, and the barb of the side brace is stuck and cannot be rotated, or the rotation is not smooth enough.
(17) Appearance of the rolling shuttle: there are many continuous warp breaks near the edge of the cloth. Although it is connected properly, there are still many yarn tails on the surface of the cloth after the continuous weaving, and the cloth is woven from the joint. Rarity anomaly.
Causes:
The shuttle is clamped in the shed, so many warp yarns are cut off. Mostly caused by poor shuttle structure, hindered movements of the shuttle and the opening. The shuttleless loom currently in use can avoid such defects.
(18) Square Eye (Reedness)
Appearance: The two warp yarns are squeezed together, the gap between the two left and right is increased, and a small checkerboard lattice is formed with the weft yarns.
Causes:
1. The opening angle of the weaving mouth is too large when weaving.
2. The tension difference between the upper and lower layers is too large.
3. The arrangement density of the reed teeth of the steel reed is uneven.
(19) Yarn Tail
Appearance: On the cloth surface or the edge of the cloth, there is a yarn tail sticking out of the cloth surface.
Causes:
Because the warp or weft yarn is broken, the yarn tail is not cut off after the connection. Or the edge shear of the loom is out of order, and the yarn tail after weft change has not been cut off.
(20) Connector (Knot)
Appearance: There are thick and round balls tightly knotted on the cloth.
Causes:
The warp or weft yarns are joined after breaking, and the knots are too large, protruding from the cloth.
21) Float
Appearance: The warp or weft yarn is not woven according to the prescribed organization, but floats on the cloth surface.
Causes:
The opening angle of the weaving mouth is too small, or the healds are hanging unevenly, and a few warp yarns are particularly slack.
(22) Appearance of cobweb: The warp or weft yarns judged in the same part will have continuous skipping of the same part, so that the fabric of a part has no interweaving points and forms a net.
Causes:
Same as skipping yarn, only more serious.
(23) Weaving Hole
Appearance: The warp and weft yarns of the embryonic fabric break, forming holes of different sizes. This kind of defect is easy to occur in the fabric with dense warp and weft.
Causes:
The friction of the shuttle and the gripping of the barbed roller will break the warp and weft, and the rolling of the shuttle can also break the warp.
(24) Slack End
Appearance: A warp woven into the cloth, at its interweaving point, is more convex and concave than the normal one, and there is a phenomenon of arching upwards. It is generally referred to as stiffness in factories.
Causes:
The tension of a single warp yarn when weaving is small, or the warp yarn is too loose after joining the warp yarns.
(25) Slack Filing
Appearance: A weft yarn woven into the cloth, at its interweaving point, protrudes out of the cloth surface more than normal, and there is a phenomenon of arching upwards. Generally not obvious.
Causes:
A single weft yarn has less tension when weaving.
(26) Tight End
Appearance: A warp pattern in the cloth pattern is relatively flat, and the interweaving point is recessed into the cloth surface. It is more obvious in the twill and satin fabrics. In serious cases, the cloth body will be uneven.
Causes:
One of the warp yarns is caused by too much tension on the weaving, or the warp yarn is pulled too tightly after breaking.
(27) Tight Filling
Appearance: A weft yarn in the cloth pattern is relatively flat, and the interweaving point is concave in the cloth surface. Such defects are relatively rare, and both existing and tight are not obvious.
Causes:
The weft withdrawal or withdrawal is not smooth, and the tension it receives when weaving is accidentally too large.
(28) Crack appearance: several warp or weft yarns juxtaposed, inclined in an arc, forming a gap.
Causes:
Larger knots, flying knots, warp shrinkage, weft shrinkage, etc., after being removed, the adjacent warp yarns or weft yarns are not combed and closed with a steel comb.
(29) Repairing the appearance of roots: Weaving produces serious defects. Although it has been eliminated and repaired, there are still traces left.
Causes:
Warp breaking, thinning, dense roads, etc., although the cloth repairing personnel combed it with a steel comb, the arrangement of the yarn is still abnormal and there is a phenomenon of bending.
(30) Teariness
Appearance: The weft yarn in the fabric is not straight, and the weft yarn with a small area is bent in the same direction. It is more common to use filamentary fibers as warp yarns, short fiber spinning as weft yarns, or fabrics with warp yarns far finer than weft yarns. For example, rich silk, brushed cloth, Oxford cloth, etc.
Causes:
1. The structure of the fabric is improperly designed, and the interweaving point of warp and weft yarns is prone to slip.
2. The weft density is relatively thin, and the tension on the warp yarns during weaving is too large.
3. During the printing, dyeing and finishing process, the cloth is intermittently over-clamped as it travels.
31) Broken Seelvage
Appearance: More than three continuous yarn breaks on the edge of the cloth edge, and the edge of the cloth is split to form a lack.
Causes:
1. The tension on the side yarns during weaving is too large and therefore breaks.
2. Improper use of the side brace or inconsistent specifications pull the side yarn off.
(32) Tight Selvage
Appearance: The fabric edge is woven straight, but the fabric inside the adjacent fabric edge is loose, and the fabric edge is not the same as the fabric body. If the cloth is flattened, the edge of the cloth is tighter than the cloth, or the cloth has a dangling phenomenon.
Causes:
The warp tension of the cloth edge during weaving is too high.
(33) Slack Selvage
Appearance: The cloth edge is not flat, like a lotus leaf shape. For example, after flattening the cloth, the cloth is flat and the edges of the cloth are wrinkled or ear-shaped.
Causes:
The tension of the warp yarn used as the cloth edge during weaving is too loose.
(34) Sawtooth edge appearance: the outermost edges of the two fabric edges are not straight, and change in a zigzag shape.
Causes:
1. The number of warp yarns used for the edge of the fabric is too small, or the edge of the fabric is not rejoined after breaking, resulting in insufficient number of edge yarns.
2. The picking force or the tension caused by the weft is too large.
(35) Uneven appearance of warp letting: The density of cloth weft yarn changes slightly with periodical density.
Causes:
During weaving, the tension or rate of warp yarns sent out is unstable.
(36) Missing needle appearance: The distance between the two rows of loops in the knitted fabric is larger than the normal one. The line connecting the two loops in the horizontal direction tends to be straight.
Causes:
When weft-knitted fabrics are woven, the yarn is not eaten into the needles, resulting in fewer rows of loops.
(37) Wrong appearance of yarn matching: fabrics with dyed yarns first, or fabrics with yarns of different specifications on the structure, the yarns are not arranged according to the design requirements, so that the patterns or patterns do not achieve the expected results. It often occurs in sliver cloth, plaid cloth and jacquard cloth of various warp yarns.
Causes:
1. The number of warp yarns of the sliver cloth and plaid fabric does not meet the requirements, or the number of the weft yarns of the plaid fabric does not meet the requirements, resulting in an abnormal shape of the sliver and lattice.
2. Warping does not arrange warp yarns of different specifications according to regulations, or weaves weft yarns of different specifications according to regulations.
(38) Starch Lump
Appearance: Dry lumps or spots of slurry appear on the surface of the fabric.
Causes:
The slurry used for sizing failed to gel completely, the sizing roller was worn, and the roller surface was uneven.
(39) Appearance of mildew spots: Gray-black or light red mildew spots appear on the surface of the embryonic fabric.
Causes:
The humidity in the storage location is too high and the storage time is too long.
Appearance: In the wool of knitted fabrics, horizontally continuous loops are woven from thicker or thinner yarns. Generally, it is a single root, but occasionally there are many parallel or spaced roots. The difference between the density and thickness is normal.
Causes:
When weaving knitted fabrics, the operator mistakenly used non-specified count or Danny yarn. If the finer yarn is misused, the fabric appears thin. If the thicker yarn is misused, the fabric will appear dense.
(2) Wrong End
Appearance: The warp of the woven fabric has a single or several parallel thicknesses that are not specified. If it is a thinner yarn, it is called Fine End. If it is a thicker yarn, it is called Coarse End.
Causes:
The warp yarn with the unspecified specification is used for the wrong count of the drawn bobbin yarn during warping. Such defects are often wholly guilty.
(3) Wrong Pick
Appearance: The weft of the woven fabric has one or more continuous non-specified thickness. If it is a finer yarn, it is called Fine Pick. If it is a thicker yarn, it is called coarse pick.
Causes:
During weaving, the weft yarn in the weft bobbin or the bobbin yarn count fed by the shuttleless loom is wrong. Use a weft yarn of a non-specified specification. After discovering, the operator will stop the machine and remove it. However, the loom with automatic tube change is often not easy to find.
(4) Wrong Weaving
Appearance: The weave is wrong, and the texture of the fabric is different from the original designer. For example, the left twill is woven into the right twill.
Causes:
Generally, it is caused by tying errors. Others such as wrong pattern of jacquard fabric, wrong warp arrangement of multi-spec warp fabric, etc.
(5) and by (Wrong Draw)
Appearance: Two adjacent warp yarns are merged together, according to the fabric structure as a woven into the cloth. In view of this, the yarn (in fact two) is particularly thick. Such defects are all scammers? If it is found during the initial weaving of the warp beam, one of the roots in the juxtaposition can be avoided completely?
Causes:
1. When warping and drawing yarn, it is negligent to treat two as one.
2. After the sizing, the yarn is not clear, and the two stick together to form the same one.
3. When threading a heald, two threads penetrate the same heald.
(6) Parallel weft (Mispick)
Appearance: Two weft yarns are woven into the same weave, and even three or more. The length of the parallel weft varies, and the width of the full width of the fabric is more than the width of 10 cm near the two sides.
Causes:
1. The full length of the fabric is parallel and weft. After the machine is shut down to eliminate the fault, the weaving opening is not checked. Or the weft-finding needle fails, and the weft-breaking does not stop automatically.
2. The parallel weft of the full length is not long enough, the warp is not long enough, the side shear is set improperly or not sharp enough, and the yarn tail is not cleared after weft break.
(7) Rare? (Set Mark, Fine)
Appearance: The density of weft yarns arranged on the fabric is less than specified. The weft yarn woven along the length of the fabric gradually becomes thinner from the normal density, and then gradually restores to the original density from the thinnest, forming a sparse cloth surface of equal width and narrow width.
Causes:
1. The weft-finding needle is out of order. When there is no weft yarn, the yarn will continue to be idling.
2. Improper warp tension control during weaving.
3. Warp tension adjustment is too tight before stopping and driving.
(8) Set Mark (Coarse)
Appearance: The density of weft yarns arranged on the fabric is denser than specified. The weft yarn woven along the length of the fabric gradually becomes denser from the normal density, and then gradually restores to the original density from the most dense, forming a compact cloth with equal width and narrow width.
Causes:
1. Improper control of warp tension during weaving.
2. Warp tension adjustment is too loose when shutting down and then driving.
(9) Pick-Out Mark
Appearance: The weft yarn of the raw fabric is not well removed, and after weaving, the trace of the fabric surface is still left.
Causes:
During the weaving of fabrics, the operator found that there were different wefts weaving, or weaving a serious dense road or thin weaving, and immediately shut down to cut and remove the weft yarn weaved. During the dismantling, the warp yarns were rubbed off by the weft yarns and produced a large amount of hairiness. Therefore, after re-weaving, in the original dismantling area, a hairy feather cloth with an equal width was displayed.
(10) Broken End
Appearance: One or more warp yarns of the fabric are broken, so that the distance between the two adjacent yarns on the left and right becomes larger. In plain weave fabrics, it becomes two yarn breaks juxtaposed, like warp. In the case of twill fabrics, there is a discontinuity in the cloth patterns.
Causes:
The warp yarn was interrupted during weaving, the stop device failed, and the weaving was continued without connecting the warp yarn.
(11) Broken Pick
Appearance: The weft yarn in the fabric is broken, but the distance between the two ends is very close, that is, the length of the broken is small. Such defects are generally not significant.
Causes:
1. The weft yarn breaks during weaving, but it continues to weave in an instant, only a short distance is missing.
2. There are serious coarse knots and flying flowers on the weft yarn, which will cause the weft yarn to break when removed.
(12) Hundred feet (lack of weft)
Appearance: This kind of defect only occurs in twill weaving, and the warp yarns in the same part of each complete organization float on the cloth surface at the same time, like a set of centipede?
Causes:
If weft yarn is woven into a weft yarn less, the interweaving point is reduced, and some warp yarns float on the weft yarn twice in a row.
(13) End Snarl
Appearance: One of the warp yarns of the fabric, a small section of curled and twisted together woven into the fabric. Fabrics woven on strong twisted yarn are more likely to occur.
Causes:
During warping, one of the warp yarns was excessively relaxed, causing a period of curling.
(14) Filling Snarl
Appearance: A small section of fabric weft yarn is crimped, twisted and woven into the fabric. Fabrics woven on strong twisted yarn are more likely to occur.
Causes:
1. In the weft bobbin or the package yarn used for weft yarn, there is a phenomenon that a small length of yarn is wound and twisted.
2. Improperly formed weft bobbin and unsmooth yarn withdrawal.
3. The tension of the weft yarn is too small, and the opening of the weave is unclear.
(15) Reed Mark
Appearance: There is a large gap between the two warp yarns of the fabric, and the weft yarn woven in can be seen, and the zigzag traces are produced by the effect of the steel reed teeth.
Causes:
1. The steel reed teeth are deformed, failing to control the warp yarn in position, or the reed teeth are loose.
2. There is one or several warp threads in the warp, and the tension received during weaving is too large.
(16) Temple Mark
Appearance: There are about 2 to 5 cm wide needle sticks or scratches on the fabric edge. In severe cases, the weft yarns in this part are wavyly bent.
Causes:
The thickness of the needle used for the side brace is not suitable, and the barb of the side brace is stuck and cannot be rotated, or the rotation is not smooth enough.
(17) Appearance of the rolling shuttle: there are many continuous warp breaks near the edge of the cloth. Although it is connected properly, there are still many yarn tails on the surface of the cloth after the continuous weaving, and the cloth is woven from the joint. Rarity anomaly.
Causes:
The shuttle is clamped in the shed, so many warp yarns are cut off. Mostly caused by poor shuttle structure, hindered movements of the shuttle and the opening. The shuttleless loom currently in use can avoid such defects.
(18) Square Eye (Reedness)
Appearance: The two warp yarns are squeezed together, the gap between the two left and right is increased, and a small checkerboard lattice is formed with the weft yarns.
Causes:
1. The opening angle of the weaving mouth is too large when weaving.
2. The tension difference between the upper and lower layers is too large.
3. The arrangement density of the reed teeth of the steel reed is uneven.
(19) Yarn Tail
Appearance: On the cloth surface or the edge of the cloth, there is a yarn tail sticking out of the cloth surface.
Causes:
Because the warp or weft yarn is broken, the yarn tail is not cut off after the connection. Or the edge shear of the loom is out of order, and the yarn tail after weft change has not been cut off.
(20) Connector (Knot)
Appearance: There are thick and round balls tightly knotted on the cloth.
Causes:
The warp or weft yarns are joined after breaking, and the knots are too large, protruding from the cloth.
21) Float
Appearance: The warp or weft yarn is not woven according to the prescribed organization, but floats on the cloth surface.
Causes:
The opening angle of the weaving mouth is too small, or the healds are hanging unevenly, and a few warp yarns are particularly slack.
(22) Appearance of cobweb: The warp or weft yarns judged in the same part will have continuous skipping of the same part, so that the fabric of a part has no interweaving points and forms a net.
Causes:
Same as skipping yarn, only more serious.
(23) Weaving Hole
Appearance: The warp and weft yarns of the embryonic fabric break, forming holes of different sizes. This kind of defect is easy to occur in the fabric with dense warp and weft.
Causes:
The friction of the shuttle and the gripping of the barbed roller will break the warp and weft, and the rolling of the shuttle can also break the warp.
(24) Slack End
Appearance: A warp woven into the cloth, at its interweaving point, is more convex and concave than the normal one, and there is a phenomenon of arching upwards. It is generally referred to as stiffness in factories.
Causes:
The tension of a single warp yarn when weaving is small, or the warp yarn is too loose after joining the warp yarns.
(25) Slack Filing
Appearance: A weft yarn woven into the cloth, at its interweaving point, protrudes out of the cloth surface more than normal, and there is a phenomenon of arching upwards. Generally not obvious.
Causes:
A single weft yarn has less tension when weaving.
(26) Tight End
Appearance: A warp pattern in the cloth pattern is relatively flat, and the interweaving point is recessed into the cloth surface. It is more obvious in the twill and satin fabrics. In serious cases, the cloth body will be uneven.
Causes:
One of the warp yarns is caused by too much tension on the weaving, or the warp yarn is pulled too tightly after breaking.
(27) Tight Filling
Appearance: A weft yarn in the cloth pattern is relatively flat, and the interweaving point is concave in the cloth surface. Such defects are relatively rare, and both existing and tight are not obvious.
Causes:
The weft withdrawal or withdrawal is not smooth, and the tension it receives when weaving is accidentally too large.
(28) Crack appearance: several warp or weft yarns juxtaposed, inclined in an arc, forming a gap.
Causes:
Larger knots, flying knots, warp shrinkage, weft shrinkage, etc., after being removed, the adjacent warp yarns or weft yarns are not combed and closed with a steel comb.
(29) Repairing the appearance of roots: Weaving produces serious defects. Although it has been eliminated and repaired, there are still traces left.
Causes:
Warp breaking, thinning, dense roads, etc., although the cloth repairing personnel combed it with a steel comb, the arrangement of the yarn is still abnormal and there is a phenomenon of bending.
(30) Teariness
Appearance: The weft yarn in the fabric is not straight, and the weft yarn with a small area is bent in the same direction. It is more common to use filamentary fibers as warp yarns, short fiber spinning as weft yarns, or fabrics with warp yarns far finer than weft yarns. For example, rich silk, brushed cloth, Oxford cloth, etc.
Causes:
1. The structure of the fabric is improperly designed, and the interweaving point of warp and weft yarns is prone to slip.
2. The weft density is relatively thin, and the tension on the warp yarns during weaving is too large.
3. During the printing, dyeing and finishing process, the cloth is intermittently over-clamped as it travels.
31) Broken Seelvage
Appearance: More than three continuous yarn breaks on the edge of the cloth edge, and the edge of the cloth is split to form a lack.
Causes:
1. The tension on the side yarns during weaving is too large and therefore breaks.
2. Improper use of the side brace or inconsistent specifications pull the side yarn off.
(32) Tight Selvage
Appearance: The fabric edge is woven straight, but the fabric inside the adjacent fabric edge is loose, and the fabric edge is not the same as the fabric body. If the cloth is flattened, the edge of the cloth is tighter than the cloth, or the cloth has a dangling phenomenon.
Causes:
The warp tension of the cloth edge during weaving is too high.
(33) Slack Selvage
Appearance: The cloth edge is not flat, like a lotus leaf shape. For example, after flattening the cloth, the cloth is flat and the edges of the cloth are wrinkled or ear-shaped.
Causes:
The tension of the warp yarn used as the cloth edge during weaving is too loose.
(34) Sawtooth edge appearance: the outermost edges of the two fabric edges are not straight, and change in a zigzag shape.
Causes:
1. The number of warp yarns used for the edge of the fabric is too small, or the edge of the fabric is not rejoined after breaking, resulting in insufficient number of edge yarns.
2. The picking force or the tension caused by the weft is too large.
(35) Uneven appearance of warp letting: The density of cloth weft yarn changes slightly with periodical density.
Causes:
During weaving, the tension or rate of warp yarns sent out is unstable.
(36) Missing needle appearance: The distance between the two rows of loops in the knitted fabric is larger than the normal one. The line connecting the two loops in the horizontal direction tends to be straight.
Causes:
When weft-knitted fabrics are woven, the yarn is not eaten into the needles, resulting in fewer rows of loops.
(37) Wrong appearance of yarn matching: fabrics with dyed yarns first, or fabrics with yarns of different specifications on the structure, the yarns are not arranged according to the design requirements, so that the patterns or patterns do not achieve the expected results. It often occurs in sliver cloth, plaid cloth and jacquard cloth of various warp yarns.
Causes:
1. The number of warp yarns of the sliver cloth and plaid fabric does not meet the requirements, or the number of the weft yarns of the plaid fabric does not meet the requirements, resulting in an abnormal shape of the sliver and lattice.
2. Warping does not arrange warp yarns of different specifications according to regulations, or weaves weft yarns of different specifications according to regulations.
(38) Starch Lump
Appearance: Dry lumps or spots of slurry appear on the surface of the fabric.
Causes:
The slurry used for sizing failed to gel completely, the sizing roller was worn, and the roller surface was uneven.
(39) Appearance of mildew spots: Gray-black or light red mildew spots appear on the surface of the embryonic fabric.
Causes:
The humidity in the storage location is too high and the storage time is too long.
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